<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        
        function Person(){
            this.name = name
            this.age = 20
            this.hobby=function(){
                console.log("喜欢篮球")
            }
        }

        let zhangsan = new Person("张三")
        let lisi = new Person("李四")

        console.log(zhangsan.hobby === lisi.hobby) //false 内存占用
    </script>
</body>
</html>